Sources for Pennsylvania Civil War History

I have been doing more research lately, preparing a book on Greene County, Pennsylvania, during the Civil War era.  I thought that I would like to share some research sources on Pennsylvania Civil War politics and antiwar sentiment.  The following are good places to start on politics in Pennsylvania during the Civil War period:

Rebecca Gifford Albright, "The Civil War Career of Andrew Gregg Curtin, Governor of Pennsylvania," Western Pennsylvania Historical Society Magazine, Vol. 47, No. 4 (October 1964).

Erwin S. Bradley, Triumph of Militant Republicanism:  A Study of Pennsylvania and Presidential Politics, 1860-1872 (Philadelphia:  University of Pennsylvania Press, 1964).

Fawn M. Brodie, Thaddeus Stevens:  Scourge of the South (New York:  W. W. Norton & Company, 1959).

Stanton L. Davis, Pennsylvania Politics, 1860-1863 (Cleveland, Ohio:  Western Reserve University, 1935).

Michael Fitzbibbon Holt, Forging a Majority:  The Formation of the Republican Party in Pittsburgh, 1848-1860 (Pittsburgh, PA:  University of Pittsburgh Press, 1990).

Alexander Kelly McClure, Old Time Notes of Pennsylvania, 2 vols. (Philadelphia:  The John C. Winston Company, 1905).

Jonathon W. White, "A Pennsylvania Judge Views the Rebellion:  The Civil War Letters of George Washington Woodward," Pennsylvania Magazine of History and Biography, Vol. 129, No. 2 (April 2005).